diff --git a/src/drivers/Qt/AboutWindow.cpp b/src/drivers/Qt/AboutWindow.cpp
index 81871444..eb2d0e7b 100644
--- a/src/drivers/Qt/AboutWindow.cpp
+++ b/src/drivers/Qt/AboutWindow.cpp
@@ -30,6 +30,7 @@
 #endif
 
 #ifdef _USE_X264
+#include <cstdint>
 #include "x264.h"
 #endif